Spheres, Amazon’s urban rainforest in downtown Seattle. Situated at the center of Downtown Seattle, the Spheres offer a natural oasis in the middle of a bustling city. The three domes house four stories of waterfalls, fish tanks, and whimsical workspaces, all at Amazon’s headquarters. The Amazon Spheres are part of the Amazon headquarters campus in Seattle and are used as employee break rooms and work spaces. The spheres are three to four stories tall and contain 40,000 plants, meeting space and retail stores. Although Spheres was built to provide a peaceful workspace for employees, Amazon has opened the facility to the public to share the experience for free on the first and third Saturdays of each month. All guests are required to book tickets online to enter the Sphere.